NPM: "The Silken Tent"

Conceit: an elaborate metaphor or simile presenting a surprisingly apt parallel between two apparently dissimilar things or feelings
(The Oxford Concise Dictionary of Literary Terms)

She is as in a field a silken tent
At midday when a sunny summer breeze
Has dried the dew and all its ropes relent,
So that in guys it gently sways at ease,
And its supporting central cedar pole,
That is its pinnacle to heavenward
And signifies the sureness of the soul,
Seems to owe naught to any single cord,
But strictly held by none, is loosely bound
By countless silken ties of love and thought
To everything on earth the compass round,
And only by one's going slightly taut
In the capriciousness of summer air
Is of the slightest bondage made aware.

~ Robert Frost (1875-1963)